Top 19
Prep plan
Updated weekly · Last refresh Oct 17

Genentech Data Analyst Interview Questions

The questions to prepare for a Genentech Data Analyst interview. Questions from real interview reports rank first. Updated daily.

19questions
~3htotal time
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1
PipelinesStart here. 4 questions · ~32 min
Data Quality and Schema EvolutionMedium

Approach for handling schema changes and data quality checks in a high-volume data lake pipeline.

schema evolutionData ModelingQualityGenentech
Building a Data Cleaning PipelineMedium

Tests your end-to-end pipeline design, transformation logic, and quality checks.

Data Qualitydata integrationtransformationsGenentech
Integrating Central and Local LabsMedium

Tests your data integration approach across lab systems and operational data flows.

data integrationETLQualityGenentech
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2
SQL & Data Manipulation4 questions + 3 drills · ~62 min
Choosing Correct Join TypesEasy

Evaluates your understanding of SQL join behavior and how to combine datasets safely.

JoinssqlGenentech
Merging With Null HandlingMedium

Tests your data quality practices when integrating heterogeneous sources.

null handlingJoinsData WranglingGenentech
Joining Datasets With Key MismatchesMedium

Tests your SQL join troubleshooting and data normalization approach for reliable analysis.

null handlingJoinsData WranglingGenentech
Optimizing Slow QueriesMedium

Tests performance tuning skills for large-scale analytics workloads.

SubqueriesPerformance TuningAggregationsGenentech
Top Interaction Sequences in SQLMedium
Practice
Practice drill

Use PostgreSQL aggregation and ranking to find the three most frequent patient interaction sequences before treatment decisions.

Data AnalysisCTEsGroup ByGenentech
Rolling Average Prescription VolumesMedium
Practice
Practice drill

Calculate three-month rolling Ocrevus prescription averages by regional territory using aggregation and window functions.

Window FunctionssqlGenentech
Shipping Confirmation Missing OrdersMedium
Practice
Practice drill

Use a left join and aggregation to identify Bed Bath & Beyond customers with orders lacking shipping confirmations.

Subqueriesnull handlingJoinsBed Bath & Beyond

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3
Behavioral & Leadership11 questions · ~88 min
Managing Vendors for Quality ComplianceMedium

Tests vendor management under quality and compliance pressure, including performance oversight, escalation judgment, and cross-functional stakeholder alignment.

Stakeholder Managementvendor managementquality engineeringGenentech
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The finish line: interview-readyComplete all 19 questions plus 3 hands-on drills to finish this plan.